WEBSITE-182 Adding redirect to nhibernate.org for nhibernate/html/performance.html

Author: hferentschik

_config/redirects.yml

@@ -99,6 +99,7 @@ hib_docs/nhibernate/1.2/reference/en/html/mapping.html:                http://nh
 hib_docs/nhibernate/1.2/reference/en/html_single/:                     http://nhibernate.org
 hib_docs/nhibernate/1.2/reference/en/html/:                            http://nhibernate.org
 hib_docs/nhibernate/html/example-parentchild.html:                     http://nhibernate.org
+hib_docs/nhibernate/html/performance.html:                             http://nhibernate.org
 hib_docs/tools/reference/en/html_single/:                              http://www.jboss.org/tools/docs/
 hib_docs/tools/reference/en/html/ant.html:                             http://docs.jboss.org/hibernate/core/3.6/reference/en-US/html/toolsetguide.html#toolsetguide-s1-5